JPS5921974B2 - false twisting device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a five-axis circumscribed friction false twisting device using a plurality of discs, and provides a device that can false twist two yarns at the same time. .

A set of three shafts is provided, a friction disk is provided on each shaft so that a part of the disk overlaps, and the friction disk is attached to the set of three shafts. False twisting is performed depending on how tightly the yarn is passed through.

Various so-called three-axis circumscribed plate twisting devices have been proposed.

(For example, JP-A-48-99432, JP-A-49-13
(No. 457, 1%, 1983-14758, etc.) However, the above device processes one yarn with one false twisting device that utilizes a friction disk attached to a set of three shafts. Therefore, it is impossible to process two yarns simultaneously and independently.

Further, there are disadvantages in that productivity is poor and the overall size of the device increases.

Furthermore, a false twisting device equipped with one additional shaft in addition to the three shafts is known from Japanese Patent Application Laid-Open No. 48-99432, but this device can easily produce S-twist and Z-twist processed yarns. For the purpose of
Depending on the need for S twist or Z twist, the necessary three axes are selected from the four axes for false twisting, and it is essentially a 3-axis circumscribed plate twisting device similar to the above. However, this device also has the problem of being able to process only one yarn.

On the other hand, a 4-axis circumscribed friction false twisting device was developed in Japanese Patent Application Laid-open No. 50-118.
As proposed in No. 052, as shown in Figure 5 of the same publication, two friction disks face each other in a vertical relationship, and the other two friction disks are aligned at the same height. In a false twisting device having this structure, the tension applied to each yarn tends to be inappropriate.

This problem will be explained using FIG. 4.

FIG. 4 shows the state of contact between the friction disk of the false twisting device and the yarn, and as shown in FIG. When the thread 3 does not pass through, the frictional force F between the thread 3 and the friction disk 1 is fl and f2.
The arrow 3' in the traveling direction of the yarn 3 and the component force f1
is reversed, and as a result acts to prevent the yarn 3 from moving in the traveling direction 3'.

This means that a large tension is applied to the yarn 3 during the false twisting process, making it difficult for the yarn to be easily transferred.

Note that f2 is the force for heating the yarn.

FIG. 4B shows the case where the yarn 3 advances at an angle α within the range of the angle A formed between the rotational direction of the friction disk 1 and the shaft 2.
A component force F1 of the frictional force F is an arrow 3' indicating the direction of movement of the yarn 3.
As a result, yarn 3 is easier to transport,
As a result, no abnormal tension is applied to the yarn 3, and a good false twisting process can be performed.

That is, in the false twisting device described in JP-A No. 50-118052, one thread can be used to obtain a good textured yarn (Fig. 4B), but the other thread is The contact angle between the thread and the friction disk becomes 90° or more (Fig. 4A), and the yarn feeding effect is not exhibited.

The yarn tension (
There are extreme differences in the number of twists inserted (heating, untwisting), number of inserted twists, etc.
Unable to perform yarn processing.

Depending on the yarn quality and processing conditions, there were problems such as yarn breakage and unstable operation.

As mentioned above, in the conventional 4-axis circumscribed false twisting device, the contact angle between the friction disk and the yarn is greatly different between the two yarns, which inevitably causes unevenness in the yarn quality. This makes it extremely difficult to apply it to production machines.

The present invention was obtained in order to eliminate the drawbacks of the conventional devices, and it is possible to simultaneously process two yarns with one device, and to obtain yarns with uniform quality. It is an object of the present invention to provide a friction disk type false twisting device with a circumscribed shaft.

In order to achieve the above object, the present invention provides a device in which friction disks are provided on five axes, in which at least one friction disk can be attached and four of the five axes that rotate in the same direction are arranged on four sides. are arranged so as to form four vertices of a shape, the other one being located within the quadrilateral, and an axis located within said quadrilateral and two axes located at two adjacent vertices; In each set of axes out of a total of two sets of axes, one set of three axes, from any one axis to the adjacent set of axes, clockwise or counterclockwise in a spiral staircase pattern, The friction disks are overlapped one by one, and the helical direction of the order of the friction disks in contact with the yarn and the rotating direction of the friction disks are determined when both the two shaft groups are viewed from the yarn traveling direction. This is a false twisting device that is installed in the same direction.

The present invention will be described in detail below with reference to the drawings, but the present invention is not limited thereto.

FIG. 1 is a side view of essential parts for explaining how to assemble friction disks in a five-axis circumscribed friction false twisting device of the present invention, and FIG. 2 is a plan view of the device viewed from above.

Figures 1 and 2 show a device in which two friction discs are attached to each of five axes.To explain how to assemble each friction disc and the arrangement of the five axes with reference to the drawings, the quadrilateral Axes A, B, D, and E are arranged at each vertex, and an axis C is arranged rotatably in the same direction within the quadrilateral, and two friction disks are attached to each axis.

First, in the three axis groups C, D, and E arranged at the axis C and two adjacent vertices E, the first friction disk e1 is attached to the E axis at the lowest position, and then After mounting dl and C1 one by one in a spiral staircase pattern so that they overlap each other from the D axis to the C axis, which are adjacent axes in the clockwise direction, the fourth friction disk e2 is attached to the E axis again. Attach it and repeat this.

On the other hand, there are 2 axes in the axis group A, B, and C, which consists of axis C and three axes arranged at two adjacent vertices A and H.

After attaching the first friction disk b1 to the B-axis, sequentially stack and attach the C1a al one by one so that they overlap with the adjacent axis C-axis → A-axis in the clockwise direction, and again. A fourth friction disk b2 is attached to the B axis and this is repeated to create a spiral staircase shape so that the position becomes higher one after another.

In other words, in the case of Figures 1 and 2, the friction disks are rotated counterclockwise, so when viewed from the yarn traveling direction, the order of the friction disks in contact with the yarn for each set of shaft groups is The helical direction is counterclockwise, which is the same direction as the rotation direction of the friction disk.

In addition, in Fig. 1, among the axes of each set, the E axis and B axis are respectively
However, I installed the friction disc in the lowest position.

In general, mounting may be started from any axis among a group of three adjacent axes in each set.

However, in the case of the C-axis where the friction disk contacts two yarns, a smooth spiral staircase is created due to the relationship between the friction disks attached to the two adjacent shaft groups (A, B, C and C, D, E). It is best to arrange them in a shape.

In a device that combines the positional relationship of five axes and a friction disk as shown in Figures 1 and 2, these five axes that can rotate in the same direction are rotated counterclockwise (in the direction of the arrow in Figure 2), and the The thread Y2 is attached to the periphery of the friction disk attached to the shaft groups A, B, and C.
1 is brought into contact with the periphery of the friction disk attached to the shaft groups C, D, and E, and is caused to run in the direction of the arrow in FIG.

In other words, yarn Y2 is in contact with the friction disks attached to the A, B, and C axes, and yarn Y1 is in contact with the friction disks attached to the C, D, and E axes, and both yarns are frictionally applied in the Z direction. The yarn is false-twisted and becomes a false-twisted yarn having a torque in the Z direction.

In the apparatus having the above-mentioned configuration, the yarn Y1. For both Y2, the contact angle with the friction disk [the angle between the rotation direction of the friction disk and the yarn passing direction, α in Fig. 4B] is 90° or less, and a good heating effect and positive feeding effect are exhibited. This makes full use of the advantages of 3-axis circumscribed friction false twisting.

FIG. 3 is a plan view showing the main parts of another example of the 5-axis circumscribed friction false twisting device of the present invention in which the way the friction disks are assembled is changed.

In the above device, the friction disk is arranged in a set of axes C, D, and E consisting of adjacent axes d1→e1→C1→d2→e2→c.
Attach them in the order of 2 in a counterclockwise direction so that they overlap each other and become taller in a spiral staircase pattern.

In addition, for the other set of axes A, B, and C, a1→c1→b1
→a2→b2→c2→b2 are installed in a counterclockwise direction so as to overlap each other and become higher in a spiral staircase pattern.

In the case of Fig. 3, the friction disks are rotated in the clockwise direction (arrow in the figure), so when viewed from the direction in which the yarn travels, each set of shafts is rotated in the direction of the friction disks in contact with the yarn. The helical direction of the sequence is the clockwise direction, which is the same direction as the rotation direction of the friction disc.

Of course, in this case as well, the first axes to which the friction disks are attached need not be limited to the A-axis and the D-axis, but any of the three axes within the same axis group may be used as a reference, and the method of assembling the friction disks thereafter will be determined. It may be carried out in accordance with the above.

Then, when each axis of the five-axis false twisting device equipped with a friction disk is rotated clockwise as shown in Fig. 3, the yarn Y1
is the friction disk C2p e 2 s d2 p C1mel
They are frictionally twisted in the order of y dH, heated in the S direction, and become a false twisted yarn having torque in the S direction.

Similarly, yarn Y2 is a friction disk b2 p C2p a2 *
bl*C7 and al are heated in this order, resulting in a false twisted yarn having torque in the S direction.

FIG. 5 is a schematic diagram of the entire apparatus preferably used to simultaneously obtain two yarns of false twisted yarn using the five-axis circumscribed plate twisting apparatus of the present invention.

In FIG. 5, the two yarns 7 and 8 pulled out from the supply system package 4 are fed from the supply roller 6, and false twisted simultaneously and independently by the 5-axis circumscribed friction false twisting device 11. The twist is fixed by the heat treatment device 9.

Next, the two false-twisted yarns pass through a second roller 13 and are individually wound up as a pancage 15.

Note that 5, 12, and 14 are guides, and 10 is a holding pin for bringing the yarn into sufficient contact with the heat treatment device.

The yarn that can be processed with the false twisting device of the present invention is as follows.

These include general thermoplastic polymers such as polyamide, polyester, polyacrylic, and polyolefin.

The false twisting method can be either the conventional method of false twisting drawn yarn, or the method of continuously false twisting undrawn yarn (including highly oriented undrawn yarn) after drawing, or the method of false twisting simultaneously with drawing. It is also applicable.

Four of the five axes in the false twisting device of the present invention form the four vertices of a quadrilateral, and the remaining one is arranged within the quadrilateral, but the quadrilateral is preferably a rectangle.

Further, in order to make the yarn quality of the two threads even after processing, it is preferable that one axis arranged within a quadrilateral is arranged at the intersection of two diagonal lines of the quadrilateral.

The material of the friction disc may be any material with a high coefficient of friction, but
Particularly preferred are rubber-based, ceramic-based, and metal-based materials, and materials of these different materials may be combined as desired.

Furthermore, the characteristics of the friction disks can be changed by changing the number, diameter, thickness, vertical distance, and surface roughness of the friction disks depending on the purpose.

Since the false twisting device according to the present invention is configured as described above, it has the following effects.

(a) Two yarns can be processed simultaneously and independently in one unit of the false twisting device, which is equipped with friction disks on five shafts.

Therefore, compared to conventional equipment, it has higher efficiency and productivity, and it is possible to significantly reduce costs.

(b) Since the two yarns that are processed simultaneously and independently are each processed using a 3-axis circumscribed plate twisting device, the heating effect
It is superior to other friction false-twisting methods in terms of yarn feeding effect, running stability, high-speed workability, operability (especially yarn threading ability), etc., and can stably obtain processed yarn of good quality with less damage.

The present invention will be described below with reference to Examples.

Example 1 1 42 D spun at a take-up speed of 3,000 m and 7 minutes
-36F highly oriented undrawn polyethylene terephthalate yarn was used as package 4 of the apparatus shown in FIG. 5, and was subjected to stretching and false twisting under the following conditions to obtain two false twisted yarns.

As the heat treatment device 9, a hot plate was used.

The quality of the two false twisted yarns a and b obtained is shown in the following table, and both were sufficiently satisfactory as false twisted yarns.

[Brief Description of the Drawings] Fig. 1 is a side view showing the main parts of an example of a 5-axis circumscribed plate twisting device of the present invention, Fig. 2 is a plan view of the same, and Fig. 3 is another 5-axis circumscribed plate twisting device of the present invention. FIG. 4 is an explanatory diagram showing the relationship between the contact angle and component force between the yarn and the friction disk; FIG.
The figure is a schematic view of the entire apparatus preferably used to obtain two-filament false-twisted Calloe yarn using the five-axis circumscribed plate twisting apparatus of the present invention. A, B, C, D, E, 2----” axis, al e a2 +blyb2+ C1*C2m
dl e d2y el *e2y 1"""Friction disk, Yl, Y2, 3, 7.8... Thread, 4.
...Supply system package, 6 ... Supply roller, 9 ... Heat treatment device, 11 ... 5-axis external friction false twisting device, 14 ... ...False twisted yarn package.

Claims (1)

[Claims] 1 At least one friction disk can be attached to five axes rotating in the same direction, four of which form the four vertices of a quadrilateral and the other one located within the quadrilateral. The axes of each set of a total of two axes groups, each consisting of a set of three axes consisting of an axis disposed within the quadrilateral and two axes disposed at two adjacent vertices. In the group, the friction disks are sequentially overlapped clockwise or counterclockwise in a spiral staircase pattern from one arbitrary shaft to the adjacent shaft group, and both of the two shaft groups have threads. A false twisting device in which the helical direction of the friction disks in contact with the yarn and the rotating direction of the friction disks are the same when viewed from the direction of movement of the yarn.